Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 496787
Title Analysis of improved Lattice Boltzmann phase field method for soluble surfactants
Author(s) Sman, R.G.M. van der; Meinders, M.B.J.
Source Computer Physics Communications 199 (2016). - ISSN 0010-4655 - p. 12 - 21.
DOI https://doi.org/10.1016/j.cpc.2015.10.002
Department(s) FBR Food Technology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) surfactants - phase field - lattice boltzmann
Abstract In this paper we present a novel Lattice Boltzmann model for immiscible fluids with soluble surfactants adsorbing at the interface with improved numerical and extended physical properties. The numerical improvements are based on the use of an analytical representation of a regularized delta-function in the surface free energy functional for the surfactant. Furthermore, the physics of the system have been extended to differential solubility of the surfactant combined with the use of Frumkin sorption behaviour. This enables the scheme to approach more realistic systems like foams and emulsions. This novel scheme is much superior in numerical stability than our previous scheme, based on a squared gradient approximation. Furthermore, we have observed the phenomenon of interface broadening under certain conditions. This phenomenon limits the surface pressure to about 30% of the capillary pressure of a bare droplet. It remains to be investigated whether this interface broadening reflects some physical
effect, as has been observed for proteins.
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